ATLANTA (AP) — Authorities say two firefighters have been hurt while battling a fire inside one of the terminals at Atlanta’s airport.

Atlanta Fire Rescue spokeswoman Janet Ward tells The Associated Press that the fire early Tuesday morning involved an escalator. She said two firefighters have been taken from the scene with injuries she describes as minor. There are no reports of any other injuries.

Authorities tell WXIA-TV that the fire started around 5 a.m. in Concourse T. Reese McCranie , a spokesman for Hartsfield-Jackson Atlanta International Airport, told WAGA-TV shortly after 6 a.m. that the fire had been contained.

McCranie said the blaze filled an area on the train level of the concourse with smoke, and that some passengers weren’t able to board The Plane Train — which connects the airport’s terminals — in Concourse T.

Concourse T is the first stop on the train from the main domestic terminal. Moving sidewalks also connect the concourse to the main domestic terminal at Hartsfield-Jackson, which is the world’s busiest airport.